-Azura is a [censored].
-Shegorath would drive me crazy and/or make me go on silly errands for him.
-Jyggalag worpship is only for facists.
-Dagon is like a sledghammer; not good at anything but destruction.
-Molag-Bal is the god of [censored].
I would probably go for Boethiah, Malacath or Mephala. They seem like the best choices.
The provinces could argue that facism is what they've had for the last 433 years, although whatever it is, it's done them more good than harm, considering how much infighting it's saved them. And with the lack of an emperor and talk of seccesion, there's probably going to be a lot more chaos (at least more than before) in the coming years.
Jyggalag doesnt know everything, not with free will. So he sets the deck so to speak. Its alot easier to predict what your opponent will do when he only has one option.
He can still predict what they will choose, most of the time.
She isn't even that loyal or benevolent to her followers, she's quite fine with making them live in solitude for decades and putting their sanity at risk just to win a wager with another daedric prince. Appearing motherly and benevolent is just her angle, there's all sorts of clues throughout the series that she's just as self-serving and petty as the other daedra.
But the wager was that solitude wouldn't be putting her sanity at risk; she didn't think that it would hurt her priestess. Not to mention that she was the one who brought along Dagoth Ur's downfall, and as for the Tribunal, one could argue that the deaths of Ayem and Seht were Sheogorath's doing (he seemed a lot more outraged than Azura when the Tribunal was formed). And she stopped the ashstorms in Mournhold.